Cone crusher having a device for securing the bowl liner thereof



. DECKER ET AL HA Oct. 20, 1970 Filed Oct 1967 3,534,916 7 com: CRUS VING A DEVICE FOR sacumnu THE BOWL LINER THEREOF 2 Sheets-Sheetl Oct. 20,1970 DECKER ETA L 7 3,534,916

' I H- CONE CRUSHER HAVING A DEVICE FOR SECURING THEREOF THE BOWL LINER Filed Oct}, 1967' 2 Sheets-SheetZ A 1 -.F/a.3 y

United States Patent 3,534,916 CONE CRUSHER HAVING A DEVICE FOR SECURING THE BOWL LINER THEREOF Hanns Decker, Cologne-Rath, Helmut Stockmann, Wesseling, near Cologne, and Heinz Hurtmanns, Cologne, Germany, assignors to Klockner-Humboldt-Deutz AG, Cologne-Deutz, Germany, a corporation of Germany Filed Oct. 3, 1967, Ser. No. 672,566 Int. Cl. B02c 2/00 US. Cl. 241-285 5 Claims ABSTRACT OF THE DISCLOSURE Cone crusher includes an annular bowl liner having a substantially vertical axis, a housing for the liner substantially coaxially surrounding the liner, and securing means engaging the liner at the upper end thereof so as to brace the liner against the housing, the securing means comprising a plurality of pressure screws distributed about the periphery of the annular liner.

Our invention relates to cone crusher having a device for securing the bowl liner which engages the bowl liner at the upper end thereof and braces it against the bowl or housing therefor.

In heretofore known devices for securing the bowl liner, there is provided at the upper end of the bowl liner an outwardly projecting flange or several projections. A ring formed of a number of parts engages the bowl liner beneath the flange or the projections. The ring is provided with a thread at the outer periphery thereof and is surrounded by a rotary ring formed with a thread on the innear peripheral surface thereof and threadedly engaging in the outer thread of the first-mentioned inner ring. The rotary ring abuts downwardly against the bowl or housing for the liner so that by turning the rotary ring, the inner ring and the bowl liner therewith can be either raised or lowered. It is very costly, however, to produce such a thread which has a relatively large diameter. Moreover, the rotary ring can be tightened or loosened only with great difiiculty because very great frictional forces between the ring and the liner bowl or housing, as well as in the thread proper, must be overcome.

It is accordingly an object of our invention to provide a device which avoids the foregoing disadvantages of the heretofore known devices for securing the bowl liner of a cone crusher. It is our object, more particularly, to provide such a device which permits installation and removal of a bowl liner with relative ease, and which can, furthermore, be produced by simple means and at low cost.

With the foregoing and other objects in view, we provide in accordance with our invention, in a cone crusher, an annular bowl liner having a substantially vertical axis, a bowl or housing for the liner substantially coaxially surrounding the liner, and securing means engaging the liner at the upper end thereof so as to brace the liner against the housing, the securing means comprising a plurality of pressure screws distributed about the periphery of the annular liner. The pressure screws can be tightened and loosened readily with simple means so that the insertion or removal of a bowl liner can be effected without difficulty in a short period of time. The pressure screws need not have any special construction but can be ordinary machine screws.

A cone crusher is already known wherein long tension screws are provided for tightening or bracing the bowl liner against the liner bowl or housing. These tension screws, however, engage the bowl liner at the lower and larger peripheral end of the liner. In order to permit "ice such construction, the bowl liner of this known cone crusher is provided at its lower end with a thick flange. This is very disadvantageous however, because when the bowl liner has become worn and has to be replaced, a relatively large portion thereof, constituted by this thick flange, remains and must be scrapped. Moreover, this bowlliner flange causes an extremenly non-uniform wearing of the liner during the operation of the crusher, Which requires premature replacement of the bowl liner because the crusher cone gradually works its way into the bowl liner so that a crusher gradually works its way into the bowl liner so that a crusher gape extending rectilinearly in cross section cannot be maintained. With the gyratory crusher of the invention in the instant application, on the other hand, the lower edge of the substantially conical bowl liner which is free of fastening members, has a construction which is most expedient for effecting the most favorable form of wear or abrasion. In accordance with further features of our invention, the pressure screws are passed through a clamping ring which is placed from above onto the liner bowl or housing and which can be raised or lowered against the housing with the aid of the pressure screws. The clamping ring has inwardly directed projecting means which engage the bowl liner beneath one or more outwardly extending projections thereof. It has been found to be advantageous for the projecting means of the clamping ring to be releasably connected with the other parts of the clamping ring.

Particularly when using a one-piece clamping ring, the projections at the outer periphery of the bowl liner are advantageously spaced from one another about the periphery, respectively, a distance which is greater than the width of the projections extending from the inner periphery of the clamping ring so that the clamping ring can be slide from above onto the bowl liner by passing the projections of the clamping ring through the spaces between the bowl liner projections.

In accordance with a further feature of our invention, the clamping ring and the bowl liner are preferably secured against twisting or relative rotation in the braced or tightened position thereof by means of an insert member fitted between two projections respectively on the outer periphery of the bowl liner.

In accordance with yet another feature of the invention the pressure screws pass through outwardly extending projections at the upper end of the bowl liner which are spaced from one another so that they can be supported on projections of the liner bowl or housing. The spacing and the shape of the projections are so selected that the clamping ring projections permit passage of the liner projections by turning the liner so as to be able to insert or remove the liner.

Other features which are considered as characteristic for the invention are set forth in the appended claims.

Although the invention is illustrated and described herein as cone crusher having a device for securing the bowl liner thereof, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.

The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

FIG. 1 is a partial longitudinal cross-sectional view of the upper portion of a cone crusher constructed in accordance with our invention;

FIG. 2 is a cross-sectional view of FIG. 1 taken along the lines IIII in the direction of the arrows; and

FIGS. 3 and 4 are enlarged views of modified forms of the securing device shown in the upper left-hand corner of FIG. 1.

Referring now to the drawings, and first particularly to FIGS. 1 and 2 thereof, there is shown the upper portion of a cone crusher which is provided with an upper liner bowl or housing 27, a bowl liner 28 located therein, and a crusher cone mantle 29 mounted within the bowl liner. The bowl liner 28 is provided at the upper end thereof with a plurality of outwardly directed projections 30 that are spaced equidistant from one another about the periphery of the bowl liner. At about the same level as that of the projections 30, as seen in FIG. 1, a clamping ring 31 is placed around the bowl liner. The clamping ring 31 is provided with inwardly extending projections 32 which engage the bowl liner beneath the projections 30 thereof. A plurality of pressure screws 33 pass through suitably provided threaded bores in the clamping ring 31 and abut the liner bowl or housing portion 27 at the lower ends thereof. The projections 30 extending outwardly from the bowl liner are spaced from one another a distance which is greater than the width of the projections 32 extending inwardly from the clamping ring 31.

When inserting the bowl liner, the liner is first placed within the housing 27 from below, as viewed in FIG. 1. Thereafter, the clamping ring 31 is placed on the bowl liner from above and turned until the projections 32 drop between the spaces separating the projections 30 (FIG. 2) and finally engage the projections 30 at their lower surface. By uniformly tightening the pressure screws 33, the clamping ring 31, and the bowl liner 28 therewith, is raised so that the liner has a firm seat within the liner bowl or housing 27. To secure the bowl liner and the clamping ring against twisting or relative rotation during operation of the cone crusher, an insert member or plug 34 of suitable dimensions is inserted between two of the projections 32 or 30 respectively, as shown in FIG. 2.

A modification of the upper part of the bowl liner 2 and the liner bowl or housing 3 is shown in FIG. 3 in an enlarged view. The bowl liner 2 has at its upper end radially outwardly directed projections 22 in which a respective pressure screw 23 is threaded. The lower end of the pressure screws abut projections 24 which are located at the upper end of the housing 3 and are radially inwardly directed. The spacing and the shape of the liner projections 22 and the housing projections 24 are so selected that the mantle projections 22 can slide through the recesses formed between the housing projections 24 on the housing 3 when inserting or removing the bowl liner. The bowl liner is inserted in the following manner: it is slid into the housing from below for such a distance that the conical outer surface 26 thereof engages the corresponding conical inner surface 25 of the housing 3. Then, the bowl liner is turned until the projections 22 and the pressure screws 23 accordingly are located above the projections 24. Thereafter, the screws 23 are tightened so that they exert a pressure on the projections 24 and thereby press the outer surface 26 of the bowl liner firmly against the inner surface 25 of the liner bowl or housing. The removal of the bowl liner is effected by reversing the just-outlined procedure.

Another modification of the device for securing the bowl liner in cone crushers in accordance with our invention is shown in enlarged view in FIG. 4. The bowl liner 44 has a flange-like projection 45 at the upper end thereof which projects radially outwardly. A multipartite ring 46 is mounted beneath the flange-like projection 45 and is secured by means of screws shown diagrammatically by the center line 48 thereof to a one-piece ring 47 surrounding the multipartite ring 46 and covering about half thereof. Thus the rings 46 and 47 together form a clamping ring connected by the screws 48. In the clamping ing 46, 47, pressure screws 49, represented by the center lines thereof in FIG. 4 are threaded in suitable threaded bores. The lower end of the pressure screws 49 abut the upper end of the liner bowl or housing 50. To secure the bowl liner 44, the screws 49 are tightened and are thereby pressed in the direction of the arrow 51 against the liner bowl or housing 50. Accordingly, the clamping ring 46, 47 and the bowl liner 44 are simultaneously raised and firmly pressed against the housing 50. Additional screws, not shown, can also pass through the ring 47 and press against the ring 46 when tightened in the direction of the arrow 52. Such additional screws facilitate the raising of the ring 47 when removing the clamping ring 46, 47.

We claim:

1. In a cone crusher, an annular bowl liner having a substantially vertical axis, a housing for said liner substantially coaxially surrounding said liner, securing means engaging said liner at the upper end thereof so as to brace said liner against said housing, said securing means comprising a plurality of pressure screws distributed about the periphery of said annular liner, and a clamping ring located on said liner housing and mountable thereon from above, said pressure screws being threaded in bores formed in said clamping ring, said bowl liner being formed with projecting means extending radially outwardly, and said clamping means having radially inwardly projecting means engageable with the undersurface of said bowl liner projecting means, said pressure screws being adjustable in a driection relative to said liner housing for raising and lowering said clamping ring.

2. Cone crusher according to claim 1 wherein said projecting means of said clamping ring is releasably connected to another part of said clamping ring.

3. Cone crusher according to claim 1 wherein both said projecting means of said clamping ring and of said liner comprise a plurality of peripherally spaced projections, the respective spaces between the projections of said liner being greater than the width of the respective projections of said clamping ring.

4. Cone crusher according to claim 3 including an insert member located in one of said spaces between a pair of projections of said bowl liner overlying a corresponding pair of projections of said clamping ring so as to secure said bowl liner and said clamping ring against relative rotation.

5. Cone crusher according to claim 1 wherein said bowl liner projecting means comprises a plurality of radially outwardly extending projections located at the upper end of said liner and peripherally spaced from one another and said securing means also comprises a plurality of radially inwardly extending and peripherally spaced projections located at the upper end of said housing for supporting said bowl liner projections, said pressure screws threadedly extending through said bowl liner projections respectively, and engageable with said housing projections, the spacing between said housing projections and the shape of said housing projections being such as to permit passage of said bowl liner projections therethrough and therebetween, respectively, whereby said bowl liner is insertable and removable from said cone crusher by turning said bowl liner relative to said liner housing.

References Cited UNITED STATES PATENTS 1,837,102 12/1931 Bernhard 24l299 X 2,718,358 9/1955 Burls 241-293 X 3,371,875 3/1968 Gasparac et al 24l299 3,417,932 12/1968 Patterson 241-208 FOREIGN PATENTS 864,648 1/ 1953 Germany.

FRANK T. YOST, Primary Examiner U.S. Cl. X.R. 241299. 300

@7 5 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,53%916 Dated October 20, 1970 Inventor) Hanns Decker, Helmut Stockmann and Heinz Hurtmanns It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In the heading to the printed specification, line 8, the Serial No. "672,566", should read --672,556-- SIGNED mu snuzn Anew EdmfiMFlemher, It. mm E. SGHUYLER, .13. L a 0mm fiomissioner of Patents 

